Change-over device for boiler-feed-water heaters and similar apparatus, especially applicable for locomotives



1,759,986 -OVER DEVICE FOR BOILER FEED WATER HEATERS AND SIMILAR May 27,1930. P. JULIUSBURGER CHANGE APPARATUS, ESPECIALLY APPLICABLE FORLOCOMOTIVES Filed Dec. 8, 1925 2 Sheets-Sheet 0&2

aw; 2M; rdama ATTORNEYS P. JULIUSBURGER May 27, 1930. 1,759,986

SR DEVICE FOR BOILER FEED WATER HEATERS AND SIMILAR APPARATUS ESPECIALLYAPPLICABLE FOR LOCOMOTIVES CHANGE *OV Filed Dec. 8, 1925 2 Sheets-Sheet2 Patented May 27, 1930 UNITED sirArEs PATENT .i OFFICE.

PAUL JU IusBURGEn, or c HArz oTTENBURG, 13:23pm, GERMANY s'm crAnLYariatica arin FOR LOCOMOTIVES Application filed December' 8, 1-926,Serial No. 74,211, and in Germany December 22, 19 24.

This invention relates to change-over devices for boiler feed waterheaters and similar apparatus,. more especially applicable forlocomotives;

Change-over devices are used in locomotive working, on the one hand, forensuring a uniformdistribution of theboiler scale de posits, and, on.the otherhand, for increasing the scavenging action when the feed water;10, heater-isto be freed from such deposits, of the.

precipitated boiler scale by the said scavenging action. Hitherto thechange-over member, comprised a cock or valve provided withseveralgpassage ways. Such cock or, valvein; its original simpleform'has the disadvantage that it is very difficult to-operate, asthe-cock, or valve plug has to bepressed; withv con siderable force.into the casing. in order to form tight joints between the severalcham-v 20, bers, involved and exposed to different pressures and theatmosphere, so that opposing frictional resistance to the rotation tothe plug has to be overcome and this canonly be effected withconsiderable difliculty. In an 25 endeavour. to eliminate thesedrawbacks either the plug ismade of a cylindrical shape, which rendersit impossible to obtain-a perfectly'tight'joint on allsides, or separatede-' vices, have to be used for lifting the cook pl'ugbefore rotatingit, and for firmly forcing it backagain into its joint tight position inthe casing after the rotation has been effected. Thesellifting devicesare also difficult to operate as it is necessary to overcomeconsiderable. frictional resistances due to the screwlifting means, asthe screw threadsv are of fairly large. diameter, and therefore. theyhave to. be'provid'ed with large hand wheels or levers for rotatingthem, The capacity of a change-over cook or valve however .is narrowlylimited. for technical and economic reasons, as according'to thequantities of water that can be handled by the cock or valve in a unitof time, so is the cross sectional areas'of passages, in the cook orvalve plug, and the total dimensions and weight of the cock or valve,the latter increasingin such a manner that in the larger sizes, theoperation is practically impossible by hand while the fitting thereof isrendered extremely. 'diflicult.

teriallyincreasing the Under. these circumstances the use ofcomparatively large change-over devices is of doubtful value. T a.According to. this invention, these disadvantages are eliminated byreplaclng'thefrice tionally fitted cocks or valves by a set of valveswhich are capable. of being moved without the. use of abnormal pressureor force, since therefis but little, .if'any, friction to. be overcome.By this means the cross sectional" areasuof passages? can be increasedwithin; wide limits, and apparatus of any desiredcapacity can be used'without ma dimensions and. weights, the change-over device to. this.end comprising two double-seated: valves mounted'in the. feed pipeleading, on the one hand, from the pump to the. feed water-heat er, andon the other hand, from the-feedwater heater to the boiler, the twodoubleseated valves'being soarranged in relation to each other that oneof the two shut-off .posi tions of theone valvev always. correspondson.each occasion to a definite' closing 'position of the, other valve it ibeing immaterial, whether the co-ordinated positions. are ate tai'nedsimultaneously or successively. The valves are capable of'being'arranged. inde- V pendent of each other or may be coupled to each other,and they may be operated by' hand or by power or may be controlled by a"pressure, medium.

In order that the said invention may be clearly understood and readilycarried into: efiect, the same will'now be fully described withreference tothe accompanying drawings, in which severalconstructions. ofthe change-over device are diagrammatically illustrated by wayofexample. In these draw- 1ngs Figure 1 shows in part sectionalelevation a construction of a change-over device; con-i nected to alocomotive boilerand pump, by. connectionsdiagrammaticallyillustrated,the device having two valves which are inaxial alignment and are movable in the same axial direction and capableofbeing collectively operated. V

Figure 2shows a modification of the construction shown in Figure l,withi axially aligned valves adapted to be moved in oppositedirections.Figure 3 shows a further modification of the construction illustrated inFigure 1, the .two valve axes being disposed parallel to each other andcapable of being controlled, through the medium of one and the samespindle, and onlya part of thevboiler being shown. I

ot the con- Figure 4 showsa modification struction shown in Figure'3.- 7

Throughout thedrawin s, the feed water a and 6, while P designates theconnection or branch for the ,pipe connecting the pump I p to the changeover device, while a conduit 1 013 3 ofthe latter leads to the feedwater heat- I en .V.,fand K the connection orbranch of the I change overdevice for the pipe connecting the boiler 70, to the;-device,the'latterbeing. conheaterV. I V

" Inthe construction of the device shown in Figured, where the valvesare in the positions shown therein, the feed water delivered nectedby'aconduit 3 or 4 to the feed water by the pump through the connectionP, passes through the conduit 1 and the feed water heat or connectionbranch 2 into the heater V,

V traverses'the latter in theupward direction, 7 is given during thattime the desired increase ,1 of temperature'andescapes from it throughthe branch 3, tothe valve 1), which is set for a the delivery of thewater to the outlet branch 'K of the pipe leading to theboiler. @If, for

the purpose of scavenging the feed water a heater, the direction of flowis to be reversed,

the valves a and. b are moved collectively to theleft, either by hand orby means of the pressure medium cylinder D. The feed water comingthrough the branch P from the pump 7 r I 40 then passes throughthe'branch 3 into the heater, traversesiit in the direction opposite tothat previously mentioned, that is to say, in

the downward direction, and'escapes from it through the branch 2 to theconduit 4 and the valve '5, at this moment opened for this direction'offlow, into the boiler.

In the construction of change-over device valve 6 .to the left, thelatter closes thejcon- 'duit" 4, and the former closes the conduit 5,while the feed water then passes through-the conduit 1, through thebranch-2 into the heater and escapes from the latter vthrou'gh thebranch 3 to the boilerithrough a' branch conduit-:59, specially providedfor. this posi- 1 the c'onstructionshown. inlF-igure 3, the

valveswa andb areoperated byzhand-ri'Ther I with'the conduit 5.

valve spindles are suspended from a balance or equalizing lever 0 whichis pivoted to the hand operated screw spindle d, in order to ensure auniform closing of the valves. In the valve position shown," the feedwater passes through the conduit 1, branch 2, into the heater, traversesthe latterand escapes (from it to the branch 3 whence it passes to the 1conduit 5 andthe adjoining chambers to the branch K, and then to' theboiler. WVhen the two valves are screwed upwards, the water 7 will passfrom the branch Pthrough the con du'it 5 and the'connection 3 into theheater,

connection1K leading to the boiler.-

The construction iniFigure 4 is-similar to" which it traverses now inthe opposite direction, toand through the conduit-4 into the" that ofFigure 3, with the exception that the t 7 position of the conduits isslightly different and somewhat similar to that shown 111 Figure 2, andthe branch conduit 5*" is provided and commences at the conduit 5, toenable the feed water escaping from the heater through the branch'3 topass the valve I) and into the conduit K leading to the boiler. In theposition of the valves shown in Figure 4, the

water passes from the branch P'through the 'conduit'5,'connection 3,into the heater, es-

capes from the same into the branch2 from i which it passes to andthrough theconduit 4 and is diverted by the lifted valve 6 into the v Ibranch or connection K.- WVhen the valves are screwed down, the watercomlng'from the branch P is delivered throughthe conduit 1 andbran'ch'2to the heater, which it traverses in thejreverse direction andescapestherefrom throughthefbranch 3and passes to the branch'or, connection Kby way of the branch conduit 5? and valve b. V I

The change-over cocks mentioned in t'he opening portion hereof, the"drawbacks of which are eliminated bycthe invention hereinbeforedescribed,-have as a ru1e,'in addition to'the two change-over positionsin which the water is conveyed in different or opposite directionsthrough the heater, also a switched out or inoperativeposition in whichthe water ios isdelivered from the pump directly to the boiler, theheater being completely shut-oil" from the delivery pipe. Thechange-over de-' vices according to this invention, in as far as theyhavebeen hereinbefore described, do not ovide 'this possibilityofshutting-off or switching out the heater. 'However the improvedchange-over valve shown in Figure 2 is adapted for switching out theheater by mov ing the valve 7) to the left from the position shown inFigure 2. This will have the effeet of placing the conduit 5 intocommunication with the outlet K thereby permitting the inlet P tocommunicate with the latter throughthe conduit 5 arranged in connectionIn a similar manner the change-over valves. shown inthe other fig uresof the. drawings {can be converted into combined change-over andswitching out devices by so arrangmg the mechanisms connecting thedouble seated valves as to render them independent instead ofinter-dependent of each other and thereby enable the movement of onevalve to be ellected independently of the other valve. If, for instance,the valves (1 and b shownin Figure 1' are adapted to be'operatedindependently and the valv s I) remain in the right hand position as sh'1 Figure l, and the valve a moved as laid hand position such as shownin Figure 2, then the inlet connection P would be in communication withthe outlet connection K by the conduit and the feed water heaterconnection 2 would beshut oil from the inlet branch P as well as fromthe outlet branch K, and the water Will'flow from the pump through theinlet branch P and the conduit 5 to the boiler or outlet connection orbranch K. The feed Water connection 3 however will, on the contrary, beopen, that is to say, the heater will only be switched out of the watercircuit-,there being no need for O the water to pass through the heaterin its able independently of the other or of each other, for instance,by means of a screw threaded nut and spindle, relatively to the point ofsuspension ofthe balance lever, and to lock the balance lever initsposition before moving the 'valve spindle. The valve which does nottake part in the axial or ver- L tical movement must remainpressedagainst its lower seat, and the oscillatory movement of the balancelever during-the axial adjustment of the other valve inustbe prevented,otherwise the operative mechanism becomes an inoperative structure foreffecting the movement of one valve and not the other. To this end. thevalve a in Figure 3 is lifted whilst the valve Z) remains on its bottomseat.

in order to shut off the feed Water heater con nection 2 from thebranches or connections P and K. By thus arranging the valves the waterwill pass from the branch or connection P through the conduit 5 to thebranch or connection K. By closing the member Z in the heater connection3, the heater Will beswitched off completely from the conduit 5 exactlyas in Figures 1 and 2. In a similar manner to that described withreference to Figure 3, the valves a and b s hewn inFigure 4. can beindependently operated and therefore furs ther description thereof asregards Figure :4 is considered unnecessary. T

WhatI claim and desire to secure by Letters Patent of the United Statesis 1. In combination, a boiler feed water heater and a change-overdevice, the latterv water to a boiler, and piping connecting the outletconduit to the opposite. ends of the heater, the piping and valves beingarranged for the alternate delivery or water to the opposite ends of theheater and from the said opposite ends to the outlet and for thealternate flow of water in opposite directions through the heater. v

2. In combination, a boiler feed water heater and a change-over device,the latter comprising an inlet capable of receiving water from a feedpump, piping connected to the inlet and having branches communicatingwithv opposite ends of the heater, an inlet valve controlling thebranches for the alter: nate passage of water from the piping connectedto the inlet to the opposite ends of the heater, an outlet connected toa boiler for delivering water thereto fromthe heater, piping connectedto the. outlet and having branches connected to the opposite ends oftheheater and an outlet valve controlling the outlet, the inlet andoutlet valves being associated for the alternate flow of water inopposite directions through the heater and; the alternate passage ofwaterfrom the opposite ends of the heater to the outlet.

3. In combination, a boiler feed Water heatthe alternate flow ofwaterfrom the'opposite ends of the heater, to the outlet conduit, the inletand outlet valves alsocontrolling the alternate flow of water throughtheheater in opposite directions. 3 I I 1 4:. In combination, a boiler feedwater heater and a change-over device, the latter comprising an inlet.conduit capable of receiving water; from aifeed pump, piping connectedto the inlet conduit andto theopposite ends or" the heater, an inletvalve controlling the alternate flow of water to the opposite ends ofthe heater, an outlet conduit capable of delivering water to a boiler,vpiping connected to the outlet conduit and to the opposite ends of theheater, an outlet valve controlling the alternate fiow of water to theopposite ends alternate flow of water from the opposite ends of theheater to the outlet conduit, and

means for simultaneously and collectively operatingthe inlet and outletvalves for cone trolling the alternate flow of waterthrough the heaterin opposite directions.

5. In combination, a boiler feed Water heater and a change-over device,the latter comprising an inlet conduit capable of receiving water from afeed pump, piping connected to the inletconduit and to theopposite endsof the heater, aninlet valve controlling the alternate fiow' of water tothe opposite ends of the heater, an outlet conduit capable of deliveringwaterto' a boiler, piping connected to the outlet conduit and to theopposite ends of'theheater, an outlet valve controllingthe alternateflow of water from the opposite ends of the heater to the outlet condut, and means for simultaneously and collectively operating the inlet andoutlet valves in the same direction for controlling the alternate flowofwater through the heater in V opposite directions.

6; In combination,a boiler feed water heater and a change-over device,the latter com prising an inlet conduit capable of receiving water fromafeed pump, piping connected "tothe inlet conduit and to the oppositeends of the heaterfan inlet'valve controlling the ofthe heater, anoutlet conduit capable of delivering water to a boiler, pipingconnectedto the outlet conduit and to the opposite ends of the heater, van outletvalve controllingthe alternate flow of water from the opit posite endsof the heater to the'outlet conduit, means forsimultaneously andcollecit 'tively operating the inlet and outlet valves for controllingthe alternate flow of water through the heater in opposite directions, a

branch conduit connectingthe heater to the iping, and a closing memberin the said ranch for preventing the flow of water through the heater. n

7. In combination, a boiler feed water heaterand a changeover device,the latter'comprising an inlet conduit capable of receiving waterfromja. feed pump, piping connected to the inlet conduit and to theopposite ends of the heater, an -inlet valve controlling the alternateflow of 'waterto the opposite ends of the heater, an outlet conduitcapableof delivering water to a boiler, pipingconnected to the outletconduit and to the opposite ends of theheater, an outlet valvecontrolling the alternate'flow of water from the opposite endsof'theheater to the outlet conduit, spindles attached to the valves,jabalance lever to which the spindles are pivotally attached and means formoving thelever.

8. In combination, aboiler feed water heaterand a change-over device,the latter comprising an inlet conduit capable of receiving water from afeed pump, piping connectedto the inlet'conduiti and to the oppositeends'of the heater, an inlet valve controlling the alternate-flow ofwater to the opposite ends of the-heater,"an outlet conduit capable ofdelivering water to a boiler, piping connected tothe outlet conduit eand to the opposite ends ofthe heater, an outlet valve controlling thealternate flow of water from the opposite ends of the heater to theoutlet conduit, spindles attached to the valves, a balance lever toWhich the spindles feed water ends of the heater, an outlet conduitcapable of delivering water to a boiler, piping connected to the outletconduit and to the oppositerends of the heater, an outlet valvecontrolling the alternate flow of water fromt j the opposite" ends ofthe heater to the outlet conduit, spindles attached'to the valves, abalancelever to which the spindles are pivotally attached, means formoving the lever, and mechanism on at least one of the spindles foradjusting the position of the valve con nected therewith relatively tothe balance lever. Y

10. In combination, a' boiler, feed water heater and a change-overdevice, the latter comprising an inlet conduit capable of receivingwater from a feedpump, piping con nected to the inlet conduit andto theopposite ends ofthe heater, an inlet valve controlling the alternateflow of water to the'opposite: ends of the heater,an'outlet conduitcapable of delivering Water to a boiler, piping connected to the outletconduit and to the opposite ends of the heater, an outlet valvecontrollingthe alternate flow of water from the opposite ends oftheheater to the outlet conduit, spindles attached to thevalv'es, a balancelever to which the spindles are pivotally attached, means for moving thelover, a.

branch conduit connecting the heater to the p1ping,a closing memberinthe said branch I for preventing the flow ofwater through the heater,and mechanism on at least one of the spindles for adjusting the positionof the valve connected therewith relatively to the balance lever. V

11. In combination, a'feed water heaterrangements of piping connectingeach end of the heater to both conduits, and valves in the conduitscontrolling the alternate passage V anda change-over device, thelattercomprismg an lnlet conduit, an outlet conduit, arg a of Water tothe respective ends of the heater and the alternate passage of Waterfrom the opposite ends of the heater to the outlet conduit.

12. In combination, a boiler feed Water heater and a change-over device,the latter comprising an inlet conduit, an outlet conduit, piping fortransmitting Water from the inlet conduit to both ends of the heater andfor transmitting the Water from both. ends of. the heater to the outletconduit, and valves in the inlet and outlet conduits, controlling thealternate How of the Water to both ends of the heater, the alternateflow of Water through the heater in opposite directions and thealternate flow of Water from the opposite ends of the heater to theoutlet conduit. i

PAUL J ULIUSBURGER.

